Asked this in another thread but I'll ask here as well.
I was a Relay users. One of the things I liked is that it would open a lot of things in overlay windows. Like youtube videos and such. Basically it had handlers for lots of file types and websites. Did sync do anything like that?
Yes, it did. It had native handlers for YouTube, imgur/etc. If the native handler had an issue (e.g. YouTube blocked it unless it was in YouTube's player) then you could break out to an internal or external browser.
I was a relay user for a good while but I switched to sync after I saw just how feature rich it was. I think you will be happy with sync if you liked relay. Hopefully it will be nearly the same experience for lemmy!